:root {
  --blue: #2563eb;
  --cyan: #06b6d4;
  --ink: #1f2937;
  --muted: #6b7280;
  --bg: #f7fafc;
  --card: #ffffff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}
.hero {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #fff;
  padding: 64px 24px 56px;
  text-align: center;
}
.hero img { width: 96px; height: 96px; border-radius: 22px; box-shadow: 0 8px 24px rgba(0,0,0,.2); }
.hero h1 { margin: 16px 0 6px; font-size: 30px; }
.hero p { margin: 0; opacity: .92; }
.wrap { max-width: 760px; margin: 0 auto; padding: 32px 24px 64px; }
.card { background: var(--card); border-radius: 14px; padding: 28px 28px; box-shadow: 0 2px 14px rgba(0,0,0,.06); margin-top: 22px; }
h2 { font-size: 22px; margin: 28px 0 10px; }
h3 { font-size: 17px; margin: 22px 0 6px; }
a { color: var(--blue); }
.muted { color: var(--muted); font-size: 14px; }
.btns { margin-top: 22px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 10px; text-decoration: none; font-weight: 600; }
.btn-primary { background: #fff; color: var(--blue); }
.btn-ghost { border: 1px solid rgba(255,255,255,.6); color: #fff; }
ul { padding-left: 20px; }
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 28px 16px 48px; }
hr { border: none; border-top: 1px solid #eee; margin: 28px 0; }
code { background: #eef2ff; padding: 1px 6px; border-radius: 5px; font-size: 13px; }